/// <summary>
/// When the user presses "Start Streaming Steam", first check that they are paired
/// </summary>
public static async Task<StreamContext> StartStreaming(CoreDispatcher uiDispatcher, Computer computer, MoonlightStreamConfiguration streamConfig)
{
PairingManager p = new PairingManager(computer);
// If we can't get the pair state, return
bool? pairState = await p.QueryPairState();
if (!pairState.HasValue)
{
DialogUtils.DisplayDialog(uiDispatcher, "Pair state query failed", "Failed to start streaming");
return null;
}
// If we're not paired, return
if (pairState == false)
{
DialogUtils.DisplayDialog(uiDispatcher, "Device not paired", "Failed to start streaming");
return null;
}
// Lookup the desired app in the app list
// NOTE: This will go away when we have a proper app list
int appId = await LookupAppIdForApp(uiDispatcher, new NvHttp(computer.IpAddress), "Steam");
if (appId == 0)
{
// LookupAppIdForApp() handles displaying a failure dialog
return null;
}
return new StreamContext(computer, appId, streamConfig);
}
/// <summary>
/// Pair with the hostname in the textbox
/// </summary>
public async Task Pair(CoreDispatcher uiDispatcher, Computer c)
{
Debug.WriteLine("Pairing...");
// Get the pair state.
bool? pairState = await QueryPairState();
if (pairState == true)
{
DialogUtils.DisplayDialog(uiDispatcher, "This device is already paired to the host PC", "Already Paired");
return;
}
// pairstate = null. We've encountered an error
else if (!pairState.HasValue)
{
DialogUtils.DisplayDialog(uiDispatcher, "Failed to query pair state", "Pairing failed");
return;
}
bool challenge = await PairingCryptoHelpers.PerformPairingHandshake(uiDispatcher, new WindowsCryptoProvider(), nv, nv.GetUniqueId());
if (!challenge)
{
Debug.WriteLine("Challenges failed");
return;
}
// Otherwise, everything was successful
MainPage.SaveComputer(c);
// FIXME: We can't have two dialogs open at once.
// DialogUtils.DisplayDialog(uiDispatcher, "Pairing successful", "Success");
}
/// <summary>
/// Event handler for clicking the add PC manually button
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Add_Button_Click(object sender, RoutedEventArgs e)
{
if (String.IsNullOrWhiteSpace(ip_textbox.Text) || String.IsNullOrWhiteSpace(nickname_textbox.Text))
{
DialogUtils.DisplayDialog(this.Dispatcher, "Please fill out both text boxes", "Add PC Failed");
return;
}
else
{
Computer toAdd = new Computer(nickname_textbox.Text, ip_textbox.Text);
this.Frame.Navigate(typeof(MainPage), toAdd);
}
}
public StreamContext(Computer computer, int appId, MoonlightStreamConfiguration streamConfig)
{
this.computer = computer;
this.appId = appId;
this.streamConfig = streamConfig;
}
/// <summary>
/// Uses mDNS to enumerate the machines on the network eligible to stream from
/// </summary>
/// <returns></returns>
private async Task EnumerateEligibleMachines()
{
// Make a local copy of the computer list
// The UI thread will populate the listbox with computerList whenever it pleases, so we don't want it to take the one we're modifying
List<Computer> computerListLocal = new List<Computer>(computerList);
bool modifiedList = false;
// Make sure we have the manually added PCs in here
foreach (var pc in addedPCs)
{
if (!computerListLocal.Exists(x => x.IpAddress == pc.IpAddress))
{
computerListLocal.Add(pc);
modifiedList = true;
}
}
Debug.WriteLine("Enumerating machines...");
// If there's no network, save time and don't do the time-consuming mDNS
if (!InternetAvailable)
{
if (computerListLocal.Count == 0 && !computerListLocal.Contains(noNetwork))
{
computerListLocal.Add(noNetwork);
modifiedList = true;
}
Debug.WriteLine("Network not available - skipping mDNS");
}
else
{
// Remove the placeholder
if (computerListLocal.Contains(noNetwork))
{
Debug.WriteLine("Removing \"no network\" placeholder");
computerListLocal.Remove(noNetwork);
modifiedList = true;
}
// Let Zeroconf do its magic and find everything it can with mDNS
ILookup<string, string> domains = null;
try
{
domains = await ZeroconfResolver.BrowseDomainsAsync();
}
catch (Exception e)
{
Debug.WriteLine("Browse Domains Async threw exception: " + e.Message);
}
IReadOnlyList<IZeroconfHost> responses = null;
if (domains != null)
{
try
{
responses = await ZeroconfResolver.ResolveAsync(domains.Select(g => g.Key));
}
catch (Exception e)
{
Debug.WriteLine("Exception in ZeroconfResolver.ResolverAsyc (Expected if BrowseDomainsAsync excepted): " + e.Message);
}
}
if (responses != null)
{
// Remove the "not found" placeholder
if (computerList.Contains(notFound))
{
Debug.WriteLine("Removing \"not found\" placeholder");
computerList.Remove(notFound);
modifiedList = true;
}
// Go through every response we received and grab only the ones running nvstream
foreach (var resp in responses)
{
if (resp.Services.ContainsKey("_nvstream._tcp.local."))
{
Computer toAdd = new Computer(resp.DisplayName, resp.IPAddress);
// If we don't have the computer already, add it
if (!computerListLocal.Exists(x => x.IpAddress == resp.IPAddress))
{
computerListLocal.Add(toAdd);
Debug.WriteLine(resp);
modifiedList = true;
}
}
}
}
// We're done messing with the list - it's okay for the UI thread to update it now
Computer last = LoadComputer();
if (last != null)
{
// If we don't have the computer already, add it
if (!computerListLocal.Exists(x => x.IpAddress == last.IpAddress))
{
modifiedList = true;
computerListLocal.Add(last);
}
}
// If no computers at all, say none are found.
if (computerListLocal.Count == 0)
{
Debug.WriteLine("Not Found");
modifiedList = true;
computerListLocal.Add(notFound);
}
}
if (modifiedList)
{
computerList = computerListLocal;
if (computerPicker.SelectedIndex == -1)
{
computerPicker.ItemsSource = computerList;
}
}
}
/// <summary>
/// Once we freshly pair to a computer, save it
/// </summary>
/// <param name="c">Computer we've paired to</param>
public static void SaveComputer(Computer c)
{
var settings = ApplicationData.Current.RoamingSettings;
settings.Values["computerName"] = c.Name;
settings.Values["computerIP"] = c.IpAddress;
}
/// <summary>
/// Constructor that sets nv
/// </summary>
/// <param name="nv">The NvHttp Object</param>
public PairingManager(Computer computer)
{
this.nv = new NvHttp(computer.IpAddress);
}
/// <summary>
/// Executed when the user presses "Start Streaming Steam!"
/// </summary>
private async Task StreamButton_Click_Common()
{
Debug.WriteLine("Start Streaming button pressed");
selected = (Computer)computerPicker.SelectedItem;
// User hasn't selected a machine or selected a placeholder
if (selected == null || String.IsNullOrWhiteSpace(selected.IpAddress))
{
DialogUtils.DisplayDialog(this.Dispatcher, "No machine selected", "Streaming Failed");
}
else
{
// Stop enumerating machines while we're trying to check pair state
mDnsTimer.Stop();
byte[] aesKey = PairingCryptoHelpers.GenerateRandomBytes(16);
// GameStream only uses 4 bytes of a 16 byte IV. Go figure.
byte[] aesRiIndex = PairingCryptoHelpers.GenerateRandomBytes(4);
byte[] aesIv = new byte[16];
Array.ConstrainedCopy(aesRiIndex, 0, aesIv, 0, aesRiIndex.Length);
SettingsPage s = new SettingsPage();
MoonlightStreamConfiguration config = new MoonlightStreamConfiguration(
s.GetStreamWidth(),
s.GetStreamHeight(),
s.GetStreamFps(),
10000, // FIXME: Scale by resolution
1024,
aesKey, aesIv);
StreamContext context = await ConnectionManager.StartStreaming(this.Dispatcher, selected, config);
if (context != null)
{
this.Frame.Navigate(typeof(StreamFrame), context);
}
}
}
